The number of students applying for this position __________ 320.
| A．added | B．added up |
| C．added to | D．added up to |
We students got lost in the forest and decided to remain ____we were and waited for the guide
| A．where | B．what | C．how | D．who |
—Oh my god! You__ wear slippers to attend the conference．
—I'm sorry I forgot there is a conference．
| A．must | B．can | C．should | D．shall |
In this experiment, the famous professor showed three different____ to the study of physics．
| A．means | B．methods | C．ways | D．approaches |
_______the match is lost? We can fight again!
| A．Even though | B．What though | C．If though | D．As though |
These achievements_______ without the contribution of Qian Xuesen, a key leader of the New China's nuclear, missile and so on．
| A．would have been unthinkable | B．would not be unthinkable |
C．would be unthink able |
D．would not have been unthinkable |